Printing paper

Abstract

Disclosed is Printing paper which incorporates a sheet substrate and a dye-receiving layer wherein the dye-receiving layer contains a vinylphenolic resin and a dyeable resin or contains a polymer of a vinylphenolic resin, a butyral resin and a poly-functional isocyanate. The printing paper is used in thermal sublimation transfer recording and gives an image with improved storing characteristics in terms of the light resistance, dark fading resistance, sebum resistance, plasticizer resistance, etc.

What is claimed is: 
     
       1. A printing sheet comprising: a sheet substrate having a surface; and   a dye-receiving layer disposed on said surface, said dye-receiving layer being a cross-linked coating obtained by curing a coating composition consisting essentially of:   about 100 parts by weight of a butyral resin;   about 1 to 100 parts by weight, based on 100 parts by weight butyral resin, of a vinylphenolic resin selected from homopolymers and copolymers of m-vinylphenol or p-vinylphenol;   about 1 to 50 parts by weight, based on 100 parts by weight of said butyral resin and said vinylphenolic resin combined, of at least one polyisocyanate compound; and   optionally, at least on additive selected from the group consisting of: solvents, plasticizers, whitening agents, pigments, UV absorbers, light stabilizers, antioxidants, surface-improving agents, releasing agents and antistatic agents.   
     
     
       2. A printing sheet as defined in claim 1, wherein the butyral resin has a weight average molecular weight of from about 10,000 to about 500,000 and has a degree of butyralation of 50 mol % or more and a degree of acetylation of 3% or less. 
     
     
       3. A printing sheet as defined in claim 1, wherein the vinylphenolic resin is selected from homopolymers of m-vinylphenol or p-vinylphenol. 
     
     
       4. A printing sheet as defined in claim 1, wherein the polyisocyanate compound is selected from aliphatic polyisocyanates or aromatic polyisocyanates.